Apparatus for making nitric acid.



PATBNTBD'OGT. 30,1906.

o. H. U. BRUNLEPL..

APPARATUS POR MAKING NITRIC` ACID. APPLIOATION FILED M113. 190s.

'i `fos-,clin HEINRICH ULRic-H BRNLEE, 'vor IJEIrsic-ofon'Lis. GERMANY.

APPAFiATus Fon MAKING NITRl'o ACID.

T @ZZ whom it may 'concern GermanEmperor, and a residentof' 16 yQPolitzstrasse, Leipsic-'Gohlia Saxony, Germany, have inventedy a new and useful Improved Apparatus for the-Oxidation ofthe l\Iitro,Q/e nl o the Air for the Purpose Yof Obtaining N1- tric Acid, of which the following is a specification.

For the purpose ofelfecting the oxidation of the nitrogen of the atmosphere and the conversion of the oxidation product into nitric acid it is necessary to expose the nitrogen and oxygen which are to be combined lto a temperature of 2 ,500o centigrade. Then' the Y nitric oxid obtained isto be conducted into proaching the center.

effects a quick and very Water in order to convert the same into nitric acid. vSince there were-no furnaces available by which with a process of combustion such a high temperature could be obtained, expensive electrlc energy has hitherto been used. By the invention in question this drawback is remedied. A

The object of my invention is illustrated in the accompanying drawing, in which the aparatus is'shown in sectional elevation.

With reference to the drawing, a is a closed partly ed with water.

b is a water-conductin pipe.

d is the furnace with w neet. Near the inlet of said pipes e, which conduct compressed oxy en, p i1pesf are arran ed conductin comiusti es-oil, gas, coa -dust, or the li e.

The furnace d, the mouth h of-which dips into the water, is so constructed that it possesses in proportion to its contents as small a wall as possible. The inlets of the pipes e are placed opposite to one another in such a manner that by their opposite radial arrangement the burning gaas mixtures blown off with reat velocity y them meet together. There y strong gyration is produced, which Without the necessity of causing the burning ases to move rapidly to the mouth of the nace. By this arrangement within the furnace-already at a moderate distance from its wall a temperature of nearly 3,000 centigrade is obtained, which increases on ap- Through pipe g n1- trogen is continually blown in and in such l Specification of Letters Patent.

Appiimion filed March is, 1906. 4serai No. 305,819.

l quantity Be 1t known that I, O scAa HEINRICH ,UL- Riou BRNLER, engineer, a subject' of the ressure-resisting vessel which isl A splashing over its surface. ch the pipes e conperfect combustionA V that the near the lowest admissible at which the oxidation of the nitrogen'can roceed.

temperature only falls toy Instead of separately con ucting quantities of nitrogen, as g can be omitted andthe nitrogen mixed with the oxygen pipe el By the ve ocity with' which the burnmgmixtureis driven into the furnace: the

time of combustion can be so accelerated orA -retarded that the gases leave the mouth ofl the furnace either with combustion perfectly or artially complete or still fully iiaming.

described abo've, the pipe -6o rior to entering through' f it is desired to have the flame burningliln Y l the water, the narrowed mouth of the nace effects this very advantageously, because the iiame is thereby forced to penetrate deeply into the water in a pointed form. The object of this is to provide that the iame by ushing away the water. makes a cavity for itself in which it will have4 space for development. Further, the'fiame oiers b its 'shape as small a surface as ossible to the cooling effect of the water. he products of combustion and the steam escape through valve c.4 The inside of the furnace cannot be destroyed by the high tem erature, since it is cooled on the outside.- j he-portion of the furnace pro'ectin above the water-level is always su ient y cooled by Vthe Water The ap aratus enables the combustion to be effected under any desired ressure.- The valve 'i serves as outlet for th water.

Having now described my invention, what I claim is In an apparatus for the oxidation of the nitrogen o the air `for the purpose of obtaining nitric acid, thecombination a, pressureresisting vessel, a lobular furnace in connection therewith wit mouthv rejecting down- Ward,radiallyarranged con uctin -pi es oposite each other in the wall of t e urnace for leading ox gen, combustibles and nitrogen, and a va ve for the escape of gases, as and for the pur ose specified.

In witness w ereof I have hereunto set my hand in the presence of two witnesses.

OSCAR HEINRICH ULRICH BRNLER.

Witnesses C. DIEDERICH, FR. HOYERMANN.

e mixture of nitric acid and' IOO 

